Decorative lamp



FIG. 1 is a perspective view of a decorative lamp;

FIG. 2 is a side elevational view of the lamp of FIG. 1 as viewed fromthe left side of FIG. 1;

FIG. 3 is a side elevational view of the lamp of FIG. 1 as seen from theright side of FIG. 1;

FIG. 4 is a top plan view of the lamp of FIG. 1; and,

FIG. 5 is a bottom plan view of the lamp of FIG. 1.

The broken line showing of environmental structure in FIGS. 1-5 is forillustrative purposes only and forms no part of the claimed design.

The ornamental design for a decorative lamp, as shown and described.